Much of Zuckerberg's massive net worth comes from his Facebook shares.

His net worth fluctuated in the wake of the Cambridge Analytica data scandal a few months ago, too.

Mark Zuckerberg, the founder and CEO of Facebook, lost about a sixth of his net worth this morning due to Facebook's sliding stock price. For one of the richest men in the world, that amount equated toa loss of $15.1 billion.

ForbesnowestimatesZuckerberg is worth $67.1 billion, putting him at number six on the list of the richest people in the world.

The Facebook founder's net worth seesawed in during his grilling on Capitol Hill in the wake of the company's Cambridge Analytica data scandal back in April, too. Down from its peak of $79.5 billion on February 1 (before reports of the Cambridge Analytica leak emerged in March), Zuckerberg's net worth hit a low point of $62.2 billion on March 27.

IMAGE GETTY IMAGES

Zuckerberg testifies before a U.S. Senate committee on Capitol Hill on April 10.